CN103920885B - Secondary iron ore concentrate recovery process - Google Patents
Secondary iron ore concentrate recovery process Download PDFInfo
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- CN103920885B CN103920885B CN201410182444.1A CN201410182444A CN103920885B CN 103920885 B CN103920885 B CN 103920885B CN 201410182444 A CN201410182444 A CN 201410182444A CN 103920885 B CN103920885 B CN 103920885B
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- iron ore
- ore concentrate
- reducing agent
- filling
- reduction
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 255
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 118
- 239000012141 concentrate Substances 0.000 title claims abstract description 116
- 238000011084 recovery Methods 0.000 title claims abstract description 43
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 46
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000010936 titanium Substances 0.000 claims abstract description 24
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 24
- 238000007885 magnetic separation Methods 0.000 claims abstract description 20
- 238000012216 screening Methods 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000001465 metallisation Methods 0.000 claims abstract description 11
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 12
- 239000003830 anthracite Substances 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 8
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000002006 petroleum coke Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 11
- 239000006227 byproduct Substances 0.000 abstract description 6
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000004408 titanium dioxide Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 4
- 229910052595 hematite Inorganic materials 0.000 description 4
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- -1 after filling Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to field of metallurgy is and in particular to a kind of iron ore concentrate recovery process.Of the present invention iron ore concentrate recovery process, comprises the following steps：Pretreatment, material filling, preheating, roasting reduction, cooling, fine grinding screening and magnetic separation.The filling form of three layers of concentric cylinders that present invention process adopts, secondary iron ore concentrate and reducing material are fully contacted, improve reduction efficiency, preheating, reduction, the process time of cooling step are 55～75h, obtained secondary iron ore concentrate reduction ingot, degree of metalization is more than 90%.By this reduction ingot fine grinding screening and magnetic separation, separate and obtain reducing agent iron powder and the rich-titanium material that can be used for titanium dioxide industry it is achieved that selecting the high-efficiency comprehensive utilization of titanium byproduct in process product time iron ore concentrate.
Description
Technical field
The invention belongs to field of metallurgy is and in particular to a kind of iron ore concentrate recovery process.
Background technology
The titanium resource of Panzhihua City enriches, but in common titanium selecting art, will produce a kind of side-product time Haematite
Ore deposit, its main component is TFe40～45%, TiO220～27%.In this side-product, the grade of ferrum is too low in iron ore concentrate, and
The grade of titanium is equally too low in ilmenite concentrate, and therefore its comprehensive utilization value is not high, but abandons again unfortunately with regard to this.Therefore seek
A kind of iron ore concentrate recovery process is looked for just to become the task of top priority selecting titanium side-product high-efficiency comprehensive utilization.
The method that secondary iron ore concentrate recycles at present is mainly by further magnetic separation, make the grade of ferrum reach 50% with
On, reclaim ferrum subsequently into blast furnace process, but the response rate is very low, titanium therein fully enters slag it is impossible to utilize, and dirty simultaneously
Dye environment；And the namagnetic substance selected is although it contains 30～38% about titanium, but due to reclaiming, lose profit
With being worth, can only discard, both waste of resource, pollute environment again.This technique both can reclaim ferrum, and recovery Pd, is to turn waste into wealth
Resource high-efficiency comprehensive utilization method.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of iron ore concentrate recovery process.This iron ore concentrate recovery process,
Comprise the following steps：
A, pretreatment：Secondary iron ore concentrate is sized to granularity ＜ 0.5mm, carbonaceous reducing agent is finely ground to granularity ＜ 3mm, and all dry
Dry to moisture content ＜ 3%；
B, material filling：Secondary iron ore concentrate and carbonaceous reducing agent are filled at least one end in the form of three layers of concentric cylinders
In the cylindricality tank of closing, internal layer cylinder and outer layer cylinder filling carbonaceous reducing agent, intermediate layer cylinder filling time iron ore concentrate, tank bottoms and
One layer of carbonaceous reducing agent is all covered on the cylinder after fill material；
C, preheating：Material filling, to retort, is warming up to 900 DEG C～950 DEG C with stove；
D, roasting reduction：By the material after preheating at 900～1150 DEG C, roasting 30～40h；
E, cooling：By the material furnace cooling after reduction, obtain time iron ore concentrate reduction ingot；
F, fine grinding screening：Ingot will be reduced take out, through broken, fine grinding, the secondary iron ore concentrate screening out granularity ＜ 0.075mm accounts for
More than the 80% of its gross mass；
G, magnetic separation：Secondary iron ore concentrate after screening is carried out magnetic separation, separates and obtain iron powder and rich-titanium material.
Specifically, above-mentioned iron ore concentrate recovery process, in step a, the main component of described secondary iron ore concentrate is TFe40%
～45%, TiO220%～27%.
Specifically, above-mentioned iron ore concentrate recovery process, in step a, described carbonaceous reducing agent is anthracite, coke powder, wood
At least one in charcoal or petroleum coke.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, described cylindricality tank cylindrically shaped.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the radius of described internal layer cylinder is 30mm～40mm,
The thickness of intermediate layer cylinder is 40mm～50mm, and the thickness of outer layer cylinder is 15mm～20mm.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the height of described cylindricality tank is 380mm～500mm,
Carry out roasting in the way of vertical stacking, stacking number is 1～3 layer.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, described secondary iron ore concentrate is always filled out with carbonaceous reducing agent
Filling mass ratio is 1～1.2：0.4～0.7.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the thickness that described carbonaceous reducing agent covers is：Bottom
10mm～20mm, top layer 20mm～40mm.
Specifically, above-mentioned iron ore concentrate recovery process, in step e, TFe50% in described secondary iron ore concentrate reduction ingot～
70%, TiO228%～32%；MFe45～60% (MFe is writing a Chinese character in simplified form, similarly hereinafter of metallic iron)；Degree of metalization 90%～95%.
Specifically, above-mentioned iron ore concentrate recovery process, in step g, its magnetic field intensity of described magnetic separation be 2500～
3000Gs.
Specifically, above-mentioned iron ore concentrate recovery process, in step g, the main component of the iron powder that described separation obtains is
TFe85～93%, TiO25～8%；MFe84～90%；The main component of rich-titanium material is TiO255～70%, TFe5～8%；
MFe0.5～1.5%.
The inventive method step simply it is easy to control, be can be achieved with using conventional smelting equipment.This time iron ore concentrate reclaims work
Skill can reclaim selects a large amount of side-product producing time iron ore concentrates during titanium, solves ferrum and titanium in low-grade iron ore concentrate and is difficult to
The problem recycling, the filling form of three layers of concentric cylinders of employing is so that secondary iron ore concentrate can fully be connect with reducing material
Touch, improve reduction efficiency, in recovery process, preheating, reduction, the process time of cooling step are 55～75h, and the process time is short,
Energy-saving.Content ＜ 1% of MFe in the present invention time iron ore concentrate, and in obtained secondary iron ore concentrate reduction ingot MFe for 45～
60%, its degree of metalization (MFe/TFe) is more than 90%.Magnetic separation separates its main component TFe85～93% of iron powder obtaining, its
Middle MFe84～90%, complies fully with the requirement of reducing agent iron powder, main component TiO of rich-titanium material255～70%, accord with completely
Close the requirement of raw material rich-titanium material in titanium dioxide industry.This time iron ore concentrate recovery process achieves side-product time ferrum in titanium selecting art
The comprehensive high-efficiency of concentrate utilizes.
Brief description
Fig. 1 is the profilograph of present invention process material filling
Fig. 2 is the cross-sectional view of present invention process material filling
In figure is labeled as, cylindricality tank 1, filling mould 2, secondary iron ore concentrate 3 and carbonaceous reducing agent 4.
Specific embodiment
A kind of iron ore concentrate recovery process, comprises the following steps：
A, pretreatment：Secondary iron ore concentrate is sized to granularity ＜ 0.5mm, carbonaceous reducing agent is finely ground to granularity ＜ 3mm, and all dry
Dry to moisture content ＜ 3%；
B, material filling：Secondary iron ore concentrate and carbonaceous reducing agent are filled at least one end in the form of three layers of concentric cylinders
In the cylindricality tank of closing, internal layer cylinder and outer layer cylinder filling carbonaceous reducing agent, intermediate layer cylinder filling time iron ore concentrate, tank bottoms and
One layer of carbonaceous reducing agent is all covered on the cylinder after fill material；
C, preheating：Material filling, to retort, is warming up to 900 DEG C～950 DEG C with stove；
D, roasting reduction：By the material after preheating at 900～1150 DEG C, roasting 30～40h；
E, cooling：By the material furnace cooling after reduction, obtain time iron ore concentrate reduction ingot；
F, fine grinding screening：Ingot will be reduced take out, through broken, fine grinding, the secondary iron ore concentrate screening out granularity ＜ 0.075mm accounts for
More than the 80% of its gross mass；
G, magnetic separation：Secondary iron ore concentrate after screening is carried out magnetic separation, separates and obtain iron powder and rich-titanium material.
Specifically, above-mentioned iron ore concentrate recovery process, in step a, the main component of described secondary iron ore concentrate is TFe40%
～45%, TiO220%～27%.
Specifically, above-mentioned iron ore concentrate recovery process, in step a, described carbonaceous reducing agent is anthracite, coke powder, wood
At least one in charcoal or petroleum coke.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, described cylindricality tank cylindrically shaped.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the radius of described internal layer cylinder is 30mm～40mm,
The thickness of intermediate layer cylinder is 40mm～50mm, and the thickness of outer layer cylinder is 15mm～20mm.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the height of described cylindricality tank is 380mm～500mm,
Carry out roasting in the way of vertical stacking, stacking number is 1～3 layer.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, described secondary iron ore concentrate is always filled out with carbonaceous reducing agent
Filling mass ratio is 1～1.2：0.4～0.7.
Specifically, above-mentioned iron ore concentrate recovery process, in step b, the thickness that described carbonaceous reducing agent covers is：Bottom
10mm～20mm, top layer 20mm～40mm.
Specifically, above-mentioned iron ore concentrate recovery process, in step e, TFe50% in described secondary iron ore concentrate reduction ingot～
70%, TiO228%～32%；MFe45～60%；Degree of metalization 90%～95%.
Specifically, above-mentioned iron ore concentrate recovery process, in step g, its magnetic field intensity of described magnetic separation be 2500～
3000Gs.
Specifically, above-mentioned iron ore concentrate recovery process, in step g, the main component of the iron powder that described separation obtains is
TFe85～93%, TiO25～8%；MFe84～90%；The main component of rich-titanium material is TiO255～70%, TFe5～8%；
MFe0.5～1.5%.
In the present invention time iron ore concentrate recovery process pre-treatment step, secondary iron ore concentrate is sized to granularity ＜ 0.5mm and is because
The shared large percentage in titanium selecting art of the secondary iron ore concentrate of this particle size range, is increased without fine milling step, and this granularity meets
Application claims；Carbonaceous reducing agent is finely ground to granularity ＜ 3mm and is because if granularity is excessive, carbonaceous reducing agent and time Haematite
The contact area of ore deposit is little, and burning velocity is too fast at high temperature for undersized, all can affect reduction effect；The equal ＜ of moisture content after drying
3% is because moisture content too high impact reduction effect, increases the recovery time, too low can increase production cost.
In the present invention time iron ore concentrate recovery process material filling step, can use mode as shown in Figure 1, 2, in filling mould
Loaded, filling rear mold can be extracted out, wherein, internal layer cylinder and outer layer cylinder filling carbonaceous reducing agent under 2 auxiliary, in
Interbed cylinder filling time iron ore concentrate is in order to carbonaceous reducing agent preferably can be contacted so that secondary iron ore concentrate is from inner with secondary iron ore concentrate
To outer all in reducing atmosphere, if internal layer cylinder is not filled with carbonaceous reducing agent, it is likely to result in the secondary ferrum of cylinder center
Concentrate is difficult to be reduced；Tank bottoms and after fill material cylinder one layer of carbonaceous reducing agent of covering is because in reduction process time Haematite
It is changed into molten condition after ore deposit metallization, easily glue tank after cooling, take out for convenience, one layer of carbonaceous reducing agent need to be spread tank bottoms,
Top layer cover carbonaceous reducing agent be in order to avoid cooling when, the metallic iron ingress of air being reduced in cylinder and by rapid oxygen
Change, need to be embedded in carbonaceous reducing agent.In material filling, the radius of internal layer cylinder is 30mm～40mm, intermediate layer post
The thickness of body is 40mm～50mm, and the thickness of outer layer cylinder is 15mm～20mm, mainly in choosing comprehensively reaction temperature with instead
In the case of between seasonable, the radius of fill material is unsuitable excessive, and otherwise the post heart is difficult to grill thoroughly, and is unfavorable for efficiently going back of time iron ore concentrate
Former, in order to be conducive to extension to produce, retort unit can be increased to realize.The height of cylindricality tank is 380mm～500mm,
Carry out roasting in the way of vertical stacking, it is holding of height according to roasting apparatus and bottom cylindricality tank that stacking number is 1～3 layer
Beijing South Maxpower Technology Co. Ltd's power considers, if stacking is too high, is susceptible to collapse in roasting process.Secondary iron ore concentrate is total with carbonaceous reducing agent
Filling quality is than for 1～1.2：0.4～0.7, carbonaceous reducing agent consumption is 4～6 times of theoretical amount, carbonaceous reducing agent excess
Reason is on the premise of ensureing time larger degree of metalization of iron ore concentrate, in whole preheating, roasting reduction and cooling procedure, secondary
Iron ore concentrate all necessarily be in the reduction atmosphere of carbonaceous reducing agent, it is to avoid the metallic iron having reduced is oxidized again, simultaneously carbon
At high temperature it may happen that burning, in order to ensure effective reduction of time iron ore concentrate, carbonaceous reducing agent needs excess to matter reducing agent；And
After secondary iron ore concentrate metallizes and freezes off molding, unreacted carbonaceous reducing agent can be reclaimed, treat use next time, do not result in wave
Take.The thickness that carbonaceous reducing agent covers：Bottom is 10mm～20mm, and top layer is 20mm～40mm, is the diameter according to retort,
The quality of filling material determines, as long as not gluing tank after can guarantee that time iron ore concentrate reduction, the metallic iron being reduced during cooling is not sudden and violent
It is exposed in the air.
In the present invention time iron ore concentrate recovery process roasting reduction step, reduction temperature need to control 900～1150 DEG C it
Between, if temperature is too low, the effect reducing is bad, and degree of metalization is relatively low, if temperature is too high, increases the consumption of fuel,
And then increase cost, may also result in burning simultaneously, subsequently crush difficulty etc., in addition temperature is too high also can shorten roasting apparatus
Service life.Recovery time is 30～40h is that inventor determines through experiment repeatedly, time too short then secondary iron ore concentrate metal
Rate is low, and overlong time then causes waste and the carbonaceous reducing agent burning of the energy, had both wasted carbonaceous reducing agent, and had made metallic iron cold again
Do not have when but carbonaceous reducing agent protection and oxidized.
In the present invention time iron ore concentrate recovery process fine grinding screening step, fine grinding, screen out the secondary Haematite of granularity ＜ 0.075mm
Ore deposit accounts for more than the 80% of its gross mass and is more beneficial for magnetic separator sorting.
In the present invention time iron ore concentrate recovery process magnetic separation step, magnetic field intensity is because magnetic field intensity for 2500～3000Gs
Too low, magnetic separation effect on driving birds is not good, too high magnetic field intensity is relatively difficult to realize again, and this range magnetic selection time iron ore concentrate is optimal.
In present invention process, do not make specified otherwise, ratio, content, composition etc. all represent mass percent.
Embodiment 1
By secondary iron ore concentrate (TFe44.56%, TiO223.58%, MFe ＜ 1%) 8.4kg, screening to granularity is ＜ 0.5mm,
Anthracite 5.4kg, is finely ground to granularity ＜ 3mm, and it is 2.8% that secondary iron ore concentrate and anthracite are all dried to moisture content, prior to tank bottoms
Uniform fold 20mm anthracite, two hollow cylindrical mould (r1=30mm, r2=80mm) nestings are put into fire-resistant can (r3=
100mm, h=380mm) in, 8.4kg iron ore concentrate is entirely filled between two hollow cylindrical dies, the hollow cylinder of centre
(r1=30mm) in and big fill anthracite between cylinder (r2=80mm) and fire resisting tank skin, heap compresses in fact, after extracting cylindrical die out,
Filler surface uniform fold 30mm anthracite, after filling, material is flushed with fire resisting tank mouth, fire-resistant can is sent in Muffle furnace, with stove
It is warming up to 950 DEG C, heating-up time 15h, then proceed to be warming up to 1100 DEG C, roasting reduction 40h, cool to less than 200 DEG C with the furnace
Afterwards, time iron ore concentrate reduction ingot, TFe61.9%, TiO in reduction ingot are obtained230.07%；MFe56.06%, degree of metalization
90.57%.Reduction ingot is accounted for its gross mass through the secondary Iron Concentrate Quality that small grinder is finely ground to granularity ＜ 0.075mm
85.2%, the secondary iron ore concentrate after fine grinding is sent in dry-type magnetic extractor and carries out magnetic separation (magnetic field intensity 2700Gs), respectively obtain magnetic
Property material iron powder, its main component be TFe90.17%, TiO25%；MFe88.69%；Namagnetic substance rich-titanium material, it is main
Composition is TiO269.78%, TFe5.44%；MFe0.96%.
Embodiment 2
By secondary iron ore concentrate (TFe44.2%, TiO223.25%, MFe ＜ 1%) 10kg, screening to granularity is ＜ 0.5mm, no
Bituminous coal 6kg, is finely ground to granularity ＜ 3mm, and it is 2.8% that secondary iron ore concentrate and anthracite are all dried to moisture content, uniform prior to tank bottoms
Cover 20mm anthracite, two hollow cylindrical mould (r1=30mm, r2=80mm) nestings are put into fire-resistant can (r3=
100mm, h=380mm) in, 10kg iron ore concentrate is entirely filled between two hollow cylindrical dies, the hollow cylinder of centre
(r1=30mm) in and big fill anthracite between cylinder (r2=80mm) and fire resisting tank skin, heap compresses in fact, after extracting cylindrical die out,
Filler surface uniform fold 30mm anthracite, after filling, material is flushed with fire resisting tank mouth, fire-resistant can is sent in Muffle furnace, with stove
It is warming up to 950 DEG C, heating-up time 15h, then proceed to be warming up to 1150 DEG C, roasting reduction 36h, cool to less than 200 DEG C with the furnace
Afterwards, time iron ore concentrate reduction ingot, TFe63.2%, TiO in reduction ingot are obtained231.02%；MFe58.3%, degree of metalization
92.24%.Reduction ingot is accounted for its gross mass through the secondary Iron Concentrate Quality that small grinder is finely ground to granularity ＜ 0.075mm
83%, the secondary iron ore concentrate after fine grinding is sent in dry-type magnetic extractor and carries out magnetic separation (magnetic field intensity 2700Gs), respectively obtain magnetic
Material iron powder, its main component is TFe89.40%, TiO25.4%；MFe88.12%；Namagnetic substance rich-titanium material, it is main
Composition is TiO268.50%, TFe5.64%；MFe0.95%.
Claims (4)
1. time iron ore concentrate recovery process it is characterised in that：Comprise the following steps：
A, pretreatment：Secondary iron ore concentrate is sized to granularity ＜ 0.5mm, carbonaceous reducing agent is finely ground to granularity ＜ 3mm, and is all dried extremely
Moisture content ＜ 3%；The main component of described secondary iron ore concentrate is TFe 40%～45%, TiO220%～27%；Described carbon
Matter reducing agent is at least one in anthracite, Linesless charcoal or petroleum coke；
B, material filling：Secondary iron ore concentrate and carbonaceous reducing agent are filled at least one end closing in the form of three layers of concentric cylinders
Cylindricality tank in, internal layer cylinder and outer layer cylinder filling carbonaceous reducing agent, intermediate layer cylinder filling time iron ore concentrate, tank bottoms and filling
One layer of carbonaceous reducing agent is all covered on the cylinder after material；Described cylindricality tank cylindrically shaped；Described internal layer cylinder
Radius be 30mm～40mm, the thickness of intermediate layer cylinder is 40mm～50mm, and the thickness of outer layer cylinder is 15mm～20mm；Institute
Total filling quality of the secondary iron ore concentrate stated and carbonaceous reducing agent is than for 1～1.2：0.4～0.7；Described carbonaceous reducing agent covers
Thickness be：Bottom 10mm～20mm, top layer 20mm～40mm；
C, preheating：Material filling, to cylindricality tank, is warming up to 950 DEG C of 900 DEG C≤temperature ＜ with stove；
D, roasting reduction：By the material after preheating at 900～1150 DEG C, roasting 30～40h；
E, cooling：By the material furnace cooling after reduction, obtain time iron ore concentrate reduction ingot；In described secondary iron ore concentrate reduction ingot
TFe 50%～70%, TiO228%～32%；MFe 45～60%；Degree of metalization 90%～95%；
F, fine grinding screening：Ingot will be reduced take out, through broken, fine grinding, screening out the secondary iron ore concentrate of granularity ＜ 0.075mm, to account for it total
More than the 80% of quality；
G, magnetic separation：Secondary iron ore concentrate after screening is carried out magnetic separation, separates and obtain iron powder and rich-titanium material；Its magnetic field of described magnetic separation is strong
Spend for 2500～3000Gs.
2. according to claim 1 iron ore concentrate recovery process it is characterised in that：In step g, described separation obtains
The main component of iron powder is TFe 85～93%, TiO25～8%；MFe 84～90%；The main component of rich-titanium material is TiO2
55～70%, TFe 5～8%；MFe 0.5～1.5%.
3. time iron ore concentrate recovery process it is characterised in that：Comprise the following steps：
A, pretreatment：Secondary iron ore concentrate is sized to granularity ＜ 0.5mm, carbonaceous reducing agent is finely ground to granularity ＜ 3mm, and is all dried extremely
Moisture content ＜ 3%；The main component of described secondary iron ore concentrate is TFe 40%～45%, TiO220%～27%；Described carbon
Matter reducing agent is coke powder；
B, material filling：Secondary iron ore concentrate and carbonaceous reducing agent are filled at least one end closing in the form of three layers of concentric cylinders
Cylindricality tank in, internal layer cylinder and outer layer cylinder filling carbonaceous reducing agent, intermediate layer cylinder filling time iron ore concentrate, tank bottoms and filling
One layer of carbonaceous reducing agent is all covered on the cylinder after material；Described cylindricality tank cylindrically shaped；Described internal layer cylinder
Radius be 30mm～40mm, the thickness of intermediate layer cylinder is 40mm～50mm, and the thickness of outer layer cylinder is 15mm～20mm；Institute
Total filling quality of the secondary iron ore concentrate stated and carbonaceous reducing agent is than for 1～1.2：0.4～0.7；Described carbonaceous reducing agent covers
Thickness be：Bottom 10mm～20mm, top layer 20mm～40mm；
C, preheating：Material filling, to cylindricality tank, is warming up to 950 DEG C of 900 DEG C≤temperature ＜ with stove；
D, roasting reduction：By the material after preheating at 900～1150 DEG C, roasting 30～40h；
E, cooling：By the material furnace cooling after reduction, obtain time iron ore concentrate reduction ingot；In described secondary iron ore concentrate reduction ingot
TFe 50%～70%, TiO228%～32%；MFe 45～60%；Degree of metalization 90%～95%；
F, fine grinding screening：Ingot will be reduced take out, through broken, fine grinding, screening out the secondary iron ore concentrate of granularity ＜ 0.075mm, to account for it total
More than the 80% of quality；
G, magnetic separation：Secondary iron ore concentrate after screening is carried out magnetic separation, separates and obtain iron powder and rich-titanium material；Its magnetic field of described magnetic separation is strong
Spend for 2500～3000Gs.
4. according to claim 3 iron ore concentrate recovery process it is characterised in that：In step g, described separation obtains
The main component of iron powder is TFe 85～93%, TiO25～8%；MFe 84～90%；The main component of rich-titanium material is TiO2
55～70%, TFe 5～8%；MFe 0.5～1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410182444.1A CN103920885B (en) | 2014-04-30 | 2014-04-30 | Secondary iron ore concentrate recovery process |
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| Application Number | Priority Date | Filing Date | Title |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189547A1 (en) * | 2007-09-14 | 2010-05-26 | Nippon Steel Corporation | Process for producing reduced iron pellets, and process for producing pig iron |
| CN102628092A (en) * | 2012-04-28 | 2012-08-08 | 攀枝花市尚亿科技有限责任公司 | Smelting process for vanadium titano-magnetite |
| CN102641777A (en) * | 2012-04-28 | 2012-08-22 | 攀枝花市尚亿科技有限责任公司 | Method for separating magnetic substances and nonmagnetic substances |
| CN102671759A (en) * | 2012-04-28 | 2012-09-19 | 攀枝花市尚亿科技有限责任公司 | Dry magnetic separator |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189547A1 (en) * | 2007-09-14 | 2010-05-26 | Nippon Steel Corporation | Process for producing reduced iron pellets, and process for producing pig iron |
| CN102628092A (en) * | 2012-04-28 | 2012-08-08 | 攀枝花市尚亿科技有限责任公司 | Smelting process for vanadium titano-magnetite |
| CN102641777A (en) * | 2012-04-28 | 2012-08-22 | 攀枝花市尚亿科技有限责任公司 | Method for separating magnetic substances and nonmagnetic substances |
| CN102671759A (en) * | 2012-04-28 | 2012-09-19 | 攀枝花市尚亿科技有限责任公司 | Dry magnetic separator |
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Effective date of registration: 20201201 Address after: No.8, Qiaoxing Road, Yunxiao County, Zhangzhou City, Fujian Province Patentee after: Yunxiao Food Inspection Center Address before: 617000 Panzhihua vanadium and Titanium Industrial Park, Panzhihua Sichuan science and Technology Co., Ltd. Patentee before: PANZHIHUA SHANGYI TECHNOLOGY Co.,Ltd. |
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Application publication date: 20140716 Assignee: Yunxiao County Quality Metrology Inspection and Testing Institute Assignor: Yunxiao Food Inspection Center Contract record no.: X2023980051403 Denomination of invention: Secondary iron concentrate recovery process Granted publication date: 20170308 License type: Common License Record date: 20240130 |